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New API call iso_image_get_bootcat()

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This commit is contained in:
Thomas Schmitt 2011-07-03 21:02:19 +02:00
parent 00955ba85c
commit 004aefd0b7
7 changed files with 159 additions and 5 deletions
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4
ChangeLog
View File

@ -1,3 +1,7 @@
bzr branch lp:libisofs/for-libisoburn (to become libisofs-1.1.2.tar.gz)
===============================================================================
- no novelties yet
libisofs-1.1.0.tar.gz Sat Jun 18 2011
===============================================================================

27
libisofs/eltorito.c
View File

@ -275,6 +275,9 @@ int iso_tree_add_boot_node(IsoDir *parent, const char *name, IsoBoot **boot)
free(node);
return ISO_OUT_OF_MEM;
}
node->lba = 0;
node->size = 0;
node->content = NULL;
/* atributes from parent */
node->node.mode = S_IFREG | (parent->node.mode & 0444);
@ -598,6 +601,30 @@ int iso_image_get_boot_image(IsoImage *image, ElToritoBootImage **boot,
return ISO_SUCCESS;
}
int iso_image_get_bootcat(IsoImage *image, IsoBoot **catnode, uint32_t *lba,
char **content, off_t *size)
{
IsoBoot *bootcat;
*catnode = NULL;
*lba = 0;
*content = NULL;
*size = 0;
bootcat = image->bootcat->node;
if (bootcat == NULL)
return 0;
*catnode = bootcat;
*lba = bootcat->lba;
*size = bootcat->size;
if (bootcat->size > 0 && bootcat->content != NULL) {
*content = calloc(1, bootcat->size);
if (*content == NULL)
return ISO_OUT_OF_MEM;
memcpy(*content, bootcat->content, bootcat->size);
}
return 1;
}
int iso_image_get_all_boot_imgs(IsoImage *image, int *num_boots,
ElToritoBootImage ***boots, IsoFile ***bootnodes, int flag)
{

8
libisofs/eltorito.h
View File

@ -26,6 +26,14 @@
struct Iso_Boot
{
IsoNode node;
/* >>> ts B10703: want to get content of loaded boot catalog */
/* Vreixo took care not to make it an IsoFile at load time.
So i implement this independently of IsoStream.
*/
uint32_t lba;
off_t size;
char *content;
};
/* Not more than 32 so that all entries fit into 2048 bytes */

86
libisofs/fs_image.c
View File

@ -293,6 +293,8 @@ typedef struct
uint32_t bootblocks[Libisofs_max_boot_imageS];
uint32_t catblock; /**< Block for El-Torito catalog */
off_t catsize; /* Size of boot catalog in bytes */
char *catcontent;
/* Whether inode numbers from PX entries shall be discarded */
unsigned int make_new_ino : 1 ;
@ -2078,6 +2080,10 @@ void ifs_fs_free(IsoFilesystem *fs)
free(data->biblio_file_id);
free(data->input_charset);
free(data->local_charset);
if(data->catcontent != NULL)
free(data->catcontent);
free(data);
}
@ -2328,14 +2334,15 @@ ex:;
static
int read_el_torito_boot_catalog(_ImageFsData *data, uint32_t block)
{
int ret, i, rx, last_done, idx;
int ret, i, rx, last_done, idx, bufsize;
struct el_torito_validation_entry *ve;
struct el_torito_section_header *sh;
struct el_torito_section_entry *entry; /* also usable as default_entry */
unsigned char *buffer = NULL;
unsigned char *buffer = NULL, *rpt;
LIBISO_ALLOC_MEM(buffer, unsigned char, BLOCK_SIZE);
data->num_bootimgs = 0;
data->catsize = 0;
ret = data->src->read_block(data->src, block, buffer);
if (ret < 0) {
goto ex;
@ -2367,6 +2374,7 @@ int read_el_torito_boot_catalog(_ImageFsData *data, uint32_t block)
data->eltorito = 1;
/* The Default Entry is declared mandatory */
data->catsize = 64;
data->num_bootimgs = 1;
data->platform_ids[0] = ve->platform_id[0];
memcpy(data->id_strings[0], ve->id_string, 24);
@ -2385,10 +2393,21 @@ int read_el_torito_boot_catalog(_ImageFsData *data, uint32_t block)
for (rx = 64; (buffer[rx] & 0xfe) == 0x90 && !last_done; rx += 32) {
last_done = buffer[rx] & 1;
/* Read Section Header */
/* >>> ts B10703 : load a new buffer if needed */;
sh = (struct el_torito_section_header *) (buffer + rx);
data->catsize += 32;
for (i = 0; i < sh->num_entries[0]; i++) {
rx += 32;
data->catsize += 32;
/* >>> ts B10703 : load a new buffer if needed */;
if (data->num_bootimgs >= Libisofs_max_boot_imageS) {
/* >>> ts B10703 : need to continue rather than abort */;
ret = iso_msg_submit(data->msgid, ISO_EL_TORITO_WARN, 0,
"Too many boot images found. List truncated.");
goto after_bootblocks;
@ -2410,6 +2429,27 @@ int read_el_torito_boot_catalog(_ImageFsData *data, uint32_t block)
}
}
after_bootblocks:;
if(data->catsize > 0) {
if(data->catcontent != NULL)
free(data->catcontent);
if(data->catsize > 10 * BLOCK_SIZE)
data->catsize = 10 * BLOCK_SIZE;
bufsize = data->catsize;
if (bufsize % BLOCK_SIZE)
bufsize += BLOCK_SIZE - (bufsize % BLOCK_SIZE);
data->catcontent = calloc(bufsize , 1);
if(data->catcontent == NULL) {
data->catsize = 0;
ret = ISO_OUT_OF_MEM;
goto ex;
}
for(rx = 0; rx < bufsize; rx += BLOCK_SIZE) {
rpt = (unsigned char *) (data->catcontent + rx);
ret = data->src->read_block(data->src, block + rx / BLOCK_SIZE, rpt);
if (ret < 0)
goto ex;
}
}
ret = ISO_SUCCESS;
ex:;
LIBISO_FREE_MEM(buffer);
@ -2531,6 +2571,8 @@ int iso_image_filesystem_new(IsoDataSource *src, struct iso_read_opts *opts,
iso_data_source_ref(src);
data->open_count = 0;
data->catcontent = NULL;
/* get an id for the filesystem */
data->id = ++fs_dev_id;
@ -2802,9 +2844,10 @@ static
int image_builder_create_node(IsoNodeBuilder *builder, IsoImage *image,
IsoFileSource *src, IsoNode **node)
{
int ret, idx;
int ret, idx, to_copy;
struct stat info;
IsoNode *new;
IsoBoot *bootcat;
char *name;
char *dest = NULL;
ImageFileSourceData *data;
@ -2861,9 +2904,28 @@ int image_builder_create_node(IsoNodeBuilder *builder, IsoImage *image,
free(name);
goto ex;
}
bootcat = (IsoBoot *) new;
bootcat->lba = data->sections[0].block;
bootcat->size = info.st_size;
if (bootcat->size > 10 * BLOCK_SIZE)
bootcat->size = 10 * BLOCK_SIZE;
bootcat->content = NULL;
if (bootcat->size > 0) {
bootcat->content = calloc(1, bootcat->size);
if (bootcat->content == NULL) {
ret = ISO_OUT_OF_MEM;
free(name);
free(new);
goto ex;
}
to_copy = bootcat->size;
if (bootcat->size > fsdata->catsize)
to_copy = fsdata->catsize;
memcpy(bootcat->content, fsdata->catcontent, to_copy);
}
/* and set the image node */
image->bootcat->node = (IsoBoot*)new;
image->bootcat->node = bootcat;
new->type = LIBISO_BOOT;
new->refcount = 1;
} else {
@ -3463,11 +3525,25 @@ int iso_image_import(IsoImage *image, IsoDataSource *src,
"patching may lead to bad results.");
}
if (image->bootcat->node == NULL) {
IsoNode *node = calloc(1, sizeof(IsoBoot));
IsoNode *node;
IsoBoot *bootcat;
node = calloc(1, sizeof(IsoBoot));
if (node == NULL) {
ret = ISO_OUT_OF_MEM;
goto import_revert;
}
bootcat = (IsoBoot *) node;
bootcat->lba = data->catblock;
bootcat->size = data->catsize;
bootcat->content = NULL;
if (bootcat->size > 0) {
bootcat->content = calloc(1, bootcat->size);
if (bootcat->content == NULL) {
ret = ISO_OUT_OF_MEM;
goto import_revert;
}
memcpy(bootcat->content, data->catcontent, bootcat->size);
}
node->type = LIBISO_BOOT;
node->mode = S_IFREG;
node->refcount = 1;

29
libisofs/libisofs.h
View File

@ -2876,6 +2876,35 @@ int iso_image_add_boot_image(IsoImage *image, const char *image_path,
int iso_image_get_boot_image(IsoImage *image, ElToritoBootImage **boot,
IsoFile **imgnode, IsoBoot **catnode);
/**
* Get detailed information about the boot catalog that was loaded from
* an ISO image.
* The boot catalog links the El Torito boot record at LBA 17 with the
* boot images which are IsoFile objects in the image. The boot catalog
* itself is not a regular file and thus will not deliver an IsoStream.
* Its content is usually quite short and can be obtained by this call.
*
* @param image
* The image to inquire.
* @param catnode
* Will return the boot catalog tree node. No extra ref is taken.
* @param lba
* Will return the block address of the boot catalog in the image.
* @param content
* Will return either NULL or an allocated memory buffer with the
* content bytes of the boot catalog.
* Dispose it by free() when no longer needed.
* @param size
* Will return the number of bytes in content.
* @return
* 1 if reply is valid, 0 if not boot catalog was loaded, < 0 on error.
*
* @since 1.1.2
*/
int iso_image_get_bootcat(IsoImage *image, IsoBoot **catnode, uint32_t *lba,
char **content, off_t *size);
/**
* Get all El-Torito boot images of an ISO image.
*

1
libisofs/libisofs.ver
View File

@ -88,6 +88,7 @@ iso_image_get_all_boot_imgs;
iso_image_get_application_id;
iso_image_get_attached_data;
iso_image_get_biblio_file_id;
iso_image_get_bootcat;
iso_image_get_boot_image;
iso_image_get_copyright_file_id;
iso_image_get_data_preparer_id;

9
libisofs/node.c
View File

@ -19,6 +19,7 @@
#include "aaip_0_2.h"
#include "messages.h"
#include "util.h"
#include "eltorito.h"
#include <stdlib.h>
@ -78,6 +79,14 @@ void iso_node_unref(IsoNode *node)
IsoSymlink *link = (IsoSymlink*) node;
free(link->dest);
}
break;
case LIBISO_BOOT:
{
IsoBoot *bootcat = (IsoBoot *) node;
if (bootcat->content != NULL)
free(bootcat->content);
}
break;
default:
/* other kind of nodes does not need to delete anything here */
break;